Formation of the universe

4.5 billion years ago our solar system was formed. Many wonder how it was formed. Space.com has an article called “How did the Solar System form?” and it explains how the solar system was formed and all the different models scientists have come up with to determine what happened. First the Sun was born from a massive dust and gas cloud, while gravity grew denser, gas clumped together. The gas became so dense that it formed a star, our sun, and had a ring around it of material that would turn into the planets. The planets would not form until another 100 million years. In the core accretion model, The solar wind swept away lighter elements, such as hydrogen and helium, from the closer regions, leaving only heavy, rocky materials to create terrestrial worlds. But farther away, the solar winds had less impact on lighter elements, allowing them to coalesce into gas giants. In the disk instability model, clumps of dust and gas are bound together early in the life of the solar system. These clumps slowly pack into gas planets, reach a stable orbit mass and form quicker than in the core accretion model. The pebble accretion model says that pebble-sized objects fused together to build giant planets up to 1,000 times faster than earlier studies.

In the lecture tutorial on page 111, there is a graph showing the temperature and distance from the sun by which each planet was formed. Terrestrial planets such as Mercury, Venus, Earth, and Mars were formed at much higher temperatures then gas giant Jovian planets like Jupiter, Saturn, Uranus, and Neptune. This article correlates to our conceptual objective 10 I can describe the nature of our solar system and how it was formed because it talks about how the sun was formed and how the planets around the sun started to form.

I enjoyed reading this article because it helped me understand more on how our solar system was formed. It was very informative and explained everything throughly.